APPLICATION NOTE 688

Trimless IF VCO: Part 2: New ICs Simplify Implementation


Abstract: Presents a family of IF voltage-controlled oscillators (VCOs) to cover the frequency range from 45MHz to 650MHz. The ICs are in 6-pin SOT23 packages. Phase noise is -100dBc/Hz for the MAX2608 at 300MHz to 500MHz. An off-chip inductor sets the operating frequency. The output stage can be matched with resistors or lossless techniques.